Heat-alarm



C. G. OVERMYER.

HEAT ALARM.

APPLICATION FILED MAY 29. 1920. 1,380,009. Patented May 31, 1921.

I Z SHEETS-SHEET l. Z2 Z 15 7 anoanto'a C. G. OVERMYER.

HEAT ALARM.

APPLICATION FiLED MAY 29. 1920.

1,380,009. Patented May 31, 1921.

2 SHEETS$HEET 2. j 4/ Q/vih'woo I a 1 UNITED STATES PATENT OFFICE.

CHARLES G. OVERMYEB, OF HARTFORD CITY, INDIANA.

HEAT-ALARM.

Application filed May 29,

To all whom it may concern Be it known that I, CHARLES OvnR- MYER, a citizen of the United States, residing at Hartford City, in the county of Blackford and State of Indiana, have mvented a new and useful Heat- Alarm, of which the following is a specification.

The present invention has reference to alarms, and more particularly to alarms known as heat alarms, to be employed 1n connection with stoves, furnaces, radlators or the like, to cause an audible slgnal to be given when the heat of the dev1ce associated with the alarm reaches a predetermined deee. A further object of the invention is to provide a device of this character whlch will be purely mechanical 1n its operation, thus eliminatlng the use of electrical appliances for accomplishing the desired result. A still further object of the lnvention is to provide a device of this character which ma be adjusted to cause the same to operate un er various degrees of temperature.

With the foregoing and other ob ects in view which will appear as the descriptlon proceeds, the invention resides in the combination and arrangement of parts and m the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without de arting from the spirit of the invention.

eferrlng to the drawings Figure 1 illustrates a plan View of an alarm constructed in accordance with the present invention, the sounding portion of the bell being removed. I

Fig. 2 illustrates a longitudinal sectional view through the signaling device, taken on line 22 of Fig. 1.

Fig. 3 illustrates arsectional vlew taken on line 33 of Fig. 1'.

Fig. 4 illustrates a bottom plan v1ew of the device.

Fig. 5 illustrates a sectional view taken on line 5-5 of Fig. 1.

Fig. 6 illustrates a sectional view showing the locking arm out of contact with the 1 tapper arm.

View taken on line 7-7 of 1 Fig. 7 illustrates a fragiental sectional 1g. 3. Referring to the drawings in detail, the

Specification of Letters I Patent.

1920. Serial No. 885,288.

reference character 10 designates the bod or base of the signal, which is formed pref erabl of sheet metal and provided with the ownwardly extending flanges 11, prov1d1ng supportmg means for the base, to support the operating mechanism in spaced relation with the stove on which the same 1s ositioned.

ecured to the upper surface of'the base 10, is the spring actuated bell 12 of usual constructlon, the same having an oscillating tapper 13 which is spring actuated, there being PIOVlded a stop indicated at 14 adapted to normally lie between the tapper arm 15 and the frame supporting the operating mechanism of the signal to prevent the operatlon of the tapper, under normal conditions.

Having connection with the under surface of the base, is a bracket member indicated at 16, which supports the actuating rod 17 that is pivotally connected to the bracket member intermediate its ends, by means of the pivot pin 18, passing through registermg openingsin the bracket and actuating r0 and as shown, one end of the actuating rod is apertured as at 19 to receive the right angled end 20 of the operating pin 21, which in turn operates through a suitable opening provided in the base.

Disposed on the upper surface of the base, and forming a part of the stop 14 is the spring arm 22 which has its lower surface Patented May 31, 1921.

contacting with the operating pin 21, where= by movement of the operating pin causes a relative movement of the spring arm to move the stop out of contact with the tapper arm 15 to permit the mechanism offlthe sounding bell to cause an audible signal 'to be produced.

The opposite end of the actuating rod is apertured to receive the pivot pin 23, which Ill for the lower end of the adjusting screw 28 operating through a threaded opening formed in the lug 29 forming a part of the controlling arm 30, which controlllng arm has one end thereof pivotally connected to the base through the bracket 31, the opposite or free end of said controlling arm operating in the slot 32 formed in the keeper 33, which is also secured to the base 10.

A semi-circular metallic member 34% has its ends connected to the bracket 31 and keeper 33 respectively, and this member 3a carries suitable gra nations on the upper surface thereof, adapted to cotiperate with the indicatinghand 35, whereby the ad usting screw maybe moved to a predetermined position, to cause the operation of the thermostat under various degrees of temperatures.

From the foregoing it is of course obvious that due to the construction of the thermostat, and relation of the adjusting screw therewith, movement of the adjusting screw causes a movement of the disks of the thermostat with relation to each other.

A spring member 36 has one of its ends positioned over the arm 29, the opposite end thereof being coiled around the pin 37 having connection with the bracket 31 so that the arm 30 is normally held behindthe shoulder 38, formed in one of the walls of the slot 32 of the keeper 33. When it is desired to prevent ringing of the bell, the arm 30 is manually moved into the upper portion of the slot so that when the thermostat cools, the spring 36 will force the arm downwardly behind the shoulder to reset the device.

In order that the device may be applied to a stove in a vertical position, a supporting member 39 extends at right angles to the body 10, to provide a support.

In the operation of the device, the adjusting screw is positioned to bring the indicating hand 35 to register'with a suitable mark on the plate 34:, with the result that the disks of the thermostat are adjusted with relation to each other to cause an alarm to be sounded when the temperature of the stove or device on which the signal is positioned, attains a degree of temperature equal to that indicated by the hand 35.

Assuming that the disks of the thermostat are heated, it will be seen that the same move away from each other, at points adjacent the outer edges thereof, with the result that further expansion causes movement of the plunger 24 to cause the actuating rod 17 to move the pin 21 through the opening in which the same is supported, with the result that the stop 14 moves out of contact with the tapper arm 15. It follows that the tapper is now moved by the mechanism of the bell to cause the signal to be sounded aeeaeee Having thus described the invention, what ll claim as new is 1. lln a heat alarm, a base, a sounding device supported by the base, a thermostat supported on the base, a pivotal means supported under the base and having connection with the thermostat and sounding device, a controlling arm having pivotal connection with the base, a keeper carried by the base, said keeper having a slot to ac commodate a portion of the controlling arm, a shoulder formed in one wall of the slot, and a coiled spring for normally forcing the arm under the shoulder.

2. In a heat alarm, a base, a pivotally supported actuating arm carried by the underside of the base, said base having a depending flange to support the base, a spring controlled sounding member carried ,by the base, a thermostat including a pair of expansible disks supported by the base, means having connection with the pivotally supported arm for contacting with one of the disks for moving the arm, means on the opposite end of the pivoted arm for operating the sounding member, a controlling arm operating over the thermostat, said controlling arm adapted to restrict move. ment of the thermostat, and means for resettin the controlling arm.

3. n a heat alarm, a base, an actuating rod pivotally supported under the base, a

sounding device supported on the base, a'

supported by the base, means for connecting the thermostat and actuating rod, a controlling arm disposed over the thermostat means carried by the controlling arm and contacting with the thermostat for restricting movement of the thermostat, and means for normally restricting movement of the controlling arm.

4. In a heat alarm, a base, an actuating rod pivotally supported under the base, a sounding device, means operated by the actuating rod for controlling the sounding device, a thermostat adapted to move the actuating rod, a controlllng arm pivotally supported over the thermostat, a keeper having a shoulder, said controlling arm adapted to normally engageunder the-shoulder, means carried by the controlling arm for restricting movement of the thermostat, and means for moving the controlling arm to a position behind the shoulder.

In testimony that l claim the foregoing as my own, l[ have hereto aflixed my signature 1n the presence of two witnesses.

CHARLES G. UVERMYER.

Witnesses:

Nun Horn, D. W. Lrmena.

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END

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